disclaimer: tags/genres grabbed from aniDB and/or ANN. I haven't watched the anime myself yet.
comedy action romance sci-fi school life drama fantasy adventure ecchi short episodes sequel
Boku no Imouto wa "Oosaka Okan"
Due to his family’s circumstances, high school student Kyousuke has been separated from his sister Namika for around 10 years. When they are finally reunited, Ky.suke realizes a lot has changed about her. Completely turned Osaka-n, Namika tries to teach him about the ways of the place she lived and the way they talk.
[short 5 min], comedy
Puchimas! Petit Idolmaster
Based on the four-panel spin-off manga by Akane, serialised in Dengeki Maou since 2011. The anime depicts the overly hyper daily life of the 765Pro idols of The Idolmaster and mysterious creatures named Puchidoll who somewhat resemble the idols.
[spinoff], [short 2 min], comedy, daily life, SD
Yama no Susume
Aoi is an indoors-type girl who is afraid of heights. Hinata likes the outdoors, specifically climbing mountains. When the two were young, they once shared a sunrise on a mountaintop. Now, they decide to attempt to relive that experience. They start small by challenging a small hill nearby. Slowly, they gain experience and comrades. How long will it take before they are able to once again witness a sunrise like they did all those years ago?
[short 5 min], comedy, daily life
Mangirl!
The daily exploits of the naive, hyper-enthusiastic editor-in-chief Hana and Japan’s cutest manga editors . cynical assistant editor-in-chief Aki, and editorial staff: glutton Tsugumi, and otaku Ringo . are frantic, as they attempt to realize their dream of launching the new number one manga magazine, the Monthly Comic Earth Star. And it does not bode well that they have zero experience in actually editing a manga...
[short 5 min], comedy
Ai Mai Mi
Ai, Mai, and Mii are members of the manga research club who fight against space invaders, compete against rivals in tournaments, and draw manga. Or so it would seem...
[short 5 min], comedy, school life
Cuticle Detective Inaba
The story revolves around Hiroshi Inaba, a private detective, and part-wolf-part-human being who was created artificially. Hiroshi runs his own detective agency and solves cases with the help of his cross-dressing secretary Yuuta, and Kei, a "relatively normal" teenager. The plot centres on Hiroshi and the gang trying to arrest his arch-nemesis Don Valentino, a mastermind goat with a taste for money (literally).
comedy, detective, slapstick
Maoyuu Maou Yuusha
The story is set in a world embroiled by war between Humans and Demons. The Humans’ greatest hero invades the Demon Queen’s castle determined to vanquish her. However, instead of fighting back, the Queen proposes an alliance with the Hero. She explains how a sudden end to the war can bring further chaos to the world as the Humans once united to stand against their common enemies would eventually begin fighting among themselves, with similar issues already occurring at the Demon Realm. Convinced by her words, the Hero joins forces with the Queen and together they execute a plan to bring prosperity and a lasting peace to both Humans and Demons alike.
fantasy, demons, dystopia, comedy
Ore no Kanojo to Osananajimi ga Shuraba Sugiru
Kidou Eita is a 1st-year high-school student. He excels academically and expresses contempt for romantic relations. He lives a normal school-life along with Harusaki Chiwa, his childhood friend whom he holds the same regard as a younger sister. One day, the school’s prettiest girl, Natsukawa Masuzu, suddenly declares her love to him. However, her real purpose is to establish a fake relationship in order to create a pretense for those around her not to bother asking her out. To this end, she makes Eita her "boyfriend" over his objections. The carnage becomes even more vicious when Eita’s "former girlfriend" Akishino Himeka and "fiancee" Fuyuumi Ai are added into the mix.
romance, school life, love polygon
Hakkenden: Touhou Hakken Ibun
Five years ago, almost every villager of Ootsuka died due to a tragic plague. But mysteriously enough, three survivors: a girl and two boys, emerged. Now living in a church, the three live in isolation, hidden from those who may seek to find them. Shino, one of the survivors, has control over the power of Murasame, the blade of life. But when the imperial church seeks to take the Murasame for themselves, their peaceful life becomes a thing of the past...
supernatural, shoujo
Senran Kagura
There was a time when there were ninja serving the powerful, hired for intelligence missions, destruction, or assassination. While the times have changed, the need for ninja has not vanished. In a particular school, there are girls who are secretly in training to become ninja. Ninjas-in-training, Asuka, Katsuragi, Hibari, Ikaruga, and Yagyuu each have a secret technique scroll that they protect at all times. This features their tumultuous school life as they pursue the path of the ninja!
action, comedy, ecchi, school life, swordplay, big breasts
Love Live! School idol project
Honoka K.saka loves her school. That’s why it’s bad news for her when she finds out it’s being shut down due to lack of new students. In order to bring in more students, Honoka decides to start a "school idol group", which is certain to get the eyes of the public. To make this dream a reality, she gathers together her close friends and classmates to make the best idol unit possible.
art, idol, school life
Ishida to Asakura
The surreal comedy centers around the friendship of high school boys.
comedy, [short 2 min]
Amnesia
Based on Amnesia, a romance adventure game for female players. August 1st. The protagonist regains consciousness in an unfamiliar cafe, with no memories of the past. Where is this place? What was the protagonist doing here? Who and what kind of life did the protagonist live? A boy appears before the protagonist. The boy’s name is Orion, and calls himself a fairy. Under Orion’s direction, the protagonist gropingly searches for clues about herself. She eventually meets people who know her: a childhood friend, a senior, and a lover.
shoujo, drama, romance, reverse-harem
Line Offline Salaryman
The anime shorts are set in the fictional Line Corporation with a motley crew of idiosyncratic workers. There is the narcissistic section head and president’s son James, the subsection head Moon (who is always gone somewhere but somehow gets his work done), the quiet but kindhearted subsection head Brown, and the subordinate Connie who is in an endless loop of yo-yo diets and weight gains.
[short 5 min]
Zettai Karen Children: The Unlimited
Kyousuke Hyoubu, an ESPer who was betrayed many years ago is now one of the most powerful ESPers, and also a fugitive. However, behind that glare lies a kind heart. His main mission is to save ESPers who are mistreated by humans, even if that be by force. Through his methods, he has saved many ESPer lives, and gained the loyalty of those he has saved. The name of his group: P.A.N.D.O.R.A.
action, sci-fi, super powers, underworld, [spinoff]
Bakumatsu Gijinden Roman
The stage is the close of the Edo period, an age when, not unlike our own time, both natural and man-made disasters left chaos in their wake. Manjiro makes a living helping the people of the troubled capital city, but behind the scenes, he also works in secret to take back precious belongings stolen from the people by unjust political powers and conspiratorial menaces. The people call him "Get-backer Roman."
fantasy, history
Senyuu
In the story, a gigantic hole suddenly opened up in the world one day, and demons appeared. The king thinks that this portends the return of the demon king Rukimedesu, who was sealed away by the hero Kureashion a millenium ago. The king decreed that the descendants of the hero must take on the threat, and 75 people showed up. Hero No. 45 (Aruba) and a sadistic palace warrior (Ross) team up, and their adventure begins.
[short 5 min], fantasy, parody
Tamako Market
Tamako is a mochi-loving high school freshman whose family runs a mochi (rice cake) shop in a certain town’s shopping district. She enjoys her high school life with her friends Midori and Kanna in the badminton club. She also helps out at her family’s shop and develops new mochi.
cooking, daily life
GJ-bu (Good Job Club)
Within the old school building of a certain high school, is the clubroom of the GJ (Good Job) Club, into which Shinomiya Kyouya finds himself forcibly conscripted. The other members are: Mao, the short and egotistical president; Megumi, Mao’s sister who’s as generous as an angel; Shion, a genius lacking in common sense; and Kirara, who is perpetually hungry.
clubs, comedy
Sasami-san@Ganbaranai
Sasami Tsukuyomi has been attempting to pass her first year of high school despite being a shut in. Fortunately, her older brother Kamiomi happens to be a teacher at the school she is supposed to attend. With the use of the .Brother Surveillance Tool. she can view the outside world via her computer. Theoretically it should be helping her adjust to interfacing with people again... Instead, it’s giving her an up close and personal view of the very odd Yagami sisters who have various types of .interest. in Kamiomi. It looks like Sasami will have to take off her pajamas and go out into the .real. world to set things straight in Sasami-san@Ganabaranai.
comedy, romance
Vividred Operation
Friendship is the key to protecting the world. That is everyone’s wish. Here in a world where science has solved all questions. This story is set in Oshima. The happy, carefree 14 year old Isshiki Akane lived a poor, but well loved life together with her reliable little sister, Momo, who does all the housework, and her grandfather, Kenjirou, a genius inventor who only created useless devices. When the weather is clear, they can see the artificial island, Blue Island, across the sea. In the center of that island rises the revolutionary Manifestation Engine, a discovery that solved the world’s energy problems. It is a peaceful future, just like everyone dreamed of. One where everyone can smile and be happy... But suddenly, the world is visited by danger. An unknown enemy, the Alone, appear, targeting the Manifestation Engine. As none of their weapons worked and they fell into despair, a lone girl takes a stand wearing a red "Pallet Suit" which wields a great, hidden power. Before long, allies gather around her to fight. And their friendship becomes the only hope for saving the world!
action, ecchi, magical girls, sci-fi
Kotoura-san
Ever since Kotoura Haruka was a little girl, she was able to read the minds of those surrounding her. And even though this gift may be special, in her life so far it only had devastating results: Her innocent babbling led to the divorce of her parents, who then left her with her grandfather. And in school Haruka loses all her friends, since none of them would or could admit the truths Haruka was able to so easily read in their minds. Haruka transfers to a new school, but has no hope of finding friends, and thus decides to keep quiet about her ability. That is, until she meets Manabe Yoshihisa, an imaginative slightly perverted boy, who becomes her first true friend, vowing to always stand by her side. Soon the enthusiastic Mifune Yuriko, president of the Paranormal Society (ESP) club, learns of Haruka’s ability and vehemently invites her -literally dragging her off- to join the club. There the club’s only other member, the under-tall, level-headed vice president Muroto Daichi welcomes her. Both Yuriko and Daichi readily accept Haruka... and for the first time she is happy, surrounded by friends, who do not treat her like a freak.
comedy, drama, school life
Mondai-Ji-tachi ga Isekai kara Kuru Sou Desu yo?
The story follows Sakamaki Izayoi, a boy bored with the entire world. One day, an envelope arrives for him. The moment Izayoi opens the envelope, he is transported to an alternate world. There, he discovers that two other problem children were transported by envelopes as well . a taciturn girl named Kasukabe You with a cat, and a beautiful yet haughty girl named Kudou Asuka. A girl named Kuro Usagi (Black Rabbit) summoned the three to the community No Name to overthrow the devil.
comedy, fantasy, animalgirls
Nekomonogatari (Kuro)

[prequel], [sequel], 4 episodes
D.C. III ~Da Capo III~

[sequel]
Minami-ke Fourth Season/Minami-ke Tadaima

[sequel]
AKB0048 Next Stage

[sequel]
Gudaguda Fairies 2

[sequel], [short 15 min]
Boku wa Tomodachi ga Sukunai NEXT

[sequel]
Chihayafuru Second Season

[sequel]
Cardfight!! Vanguard: Link Joker Hen

[sequel], [for kids?]